How did an oxygen-rich atmosphere develop from a carbon dioxide-rich atmosphere? multiple choice through photosynthesis by cyanobacteria through asteroid impacts through volcanic eruptions

How do organisms use different types of carbon compounds?

What are 2 factors that prevents joints from rubbing and wearing down your bones

Explain the theory of plate tectonics

A cell has 38 chromosomes. After mitosis and cell division, one daughter cell has 39 chromosomes and the other has 37. What might have caused these abnormal chromosome numbers? What effects do you suppose this might have on cell function? Why?

In cell biology, what does the word queue describe? the short arm of a chromosome the long arm of a chromosome the center of a chromosome the material of a chromosome

Does an electric current cause a coiled wire to become an electric bell

Which is a renewable resource? A) coal B) sunshine C) gasoline D) natural gas

How are fitness and adaptation important to natural selection?

Where do the light-independent reactions of photosynthesis occur? A. Stroma B. Thylakoids C. Cell cytoplasm D. Intermembrane space

What causes pioneer grasses and weeds that have grown in an abandoned field to die?